Corner-block machine



3 Sheets Sheet 1.

(No ModeL) E. BELDEN.

l CORNER BLOCK MACHINE. No. 595,463.

Patented Dec. 14v 1 9'7.

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(No Montiel.) 3 Sheets-Sheet 2.

C IE. BIELDEN.`

CORNER BLOCK MACHINE.

No. 595,463. Patented Deo. 14, 189.7.

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(No Model.) 3 Sheets-Sheet 3. E.' BELDEN.

CORNER BLOCK MACHINE.

Patented' Deb. 14, 1897.

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EMERSON BELDEN, OF GREEN ISLAND, NEW YORK.

CORNER-BLOCK MACHINE.

. SPECIFICATION forming part of Letters Patent No. 595,463, dated December` 14, 1897.

' Application filed January 16, 1893. Serial No. 458,472. (No model.)

combination of parts hereinafter described,

and subsequently claimed.

Reference may be had to the accompanying drawings, and the letters of reference marked thereon, which form a part of this specification.

Similar lett-ers refer to similar parts in the several gures therein.

Figure 1 of the drawings is a view, partly in side elevation and partly in central vertical longitudinal section, of my improved corner-block machine, the right-hand end being partly broken away. Fig. 2 is a vertical cross-section of same, taken on the broken line 2 2 in Fig. 1. Fig. 3 is a vertical crosssection of same, taken on the broken line 3 3 in Fig. 1. Fig. 4 is a longitudinal section of the adjustable yielding stop mechanism, taken on the broken line 4 4 in Fig. 2. Fig. 5 is a View in elevation of the right-hand end of the stop mechanism as shown in Fig. 4. Fig. 6 is a view in front elevation of one of the adjustable block-supporting piecesdetached from the carrier. Fig. 7 isa crosssection of the same, taken on the broken line 7 7 in Fig. 6. Fig.8 is a plan view of a finished cornerblock. Fig. 9 is a central longitudinal section of the yield-ing connection between the crank-pin and the toggle mechanism for operating the carrier. The last six iigures are drawn on an enlarged scale.

The object of my invention is to automatically feed and cut corner-blocks to form an ornamental rosette on each block; and my invention comprises a pair of rotary cutter heads -iixed upon opposite endswof a common shaft and mechanism-for automatically presenting blocks one at a-time to both cutterheads simultaneously.

Referring to the drawings, A A' represent a pair of rotary cutter-heads fixed upon opposite ends of the horizontal shaft A2, supported in-bearings A3 in the upper end of the uprights A4 and connected by means of the pulley A5, fixed upon the shaft, and belt A6 with suitable driving mechanism (not shown) for imparting continuous rotary movements to the cutter-heads.

B B are the block-carriers, one for each cutter-head, movable in the supporting-slideways B2 B3 toward and from the heads, in

axial line therewith, and provided each on` its end adjacent to the cutters with a blocksupporting head B4. The ways are each supported by the frame C of the machine, the way B2 being formed integral with the bedplate O on one side and the way B3 being adjustably supported in the groove or channel C2, yformed in the other side of the bedplate, as shown in Figs. 2 and 3.

The adjustment of the way B3 is accomplished by means of the screws C3, passing through the side wall of channel C2 and bearing upon the outer edge of the adjustable way, whereby I am able to decrease the distance-between the ways tocompensate for wear of the parts.

Reciprocating movements are imparted to the carrier by the exion and expansion of the toggle-joint formed by the arms B5 B6, pivotally connected at their contiguous ends B7 and pivotally connected at their other ends, respectively, to a fixed support by the pivot B8, passing through the ears O4, depending from the bed-plate O', and to the carrier by the pivot B9, passing through the ears B10 on such carrier.

The toggle mechanism is operated by the crank-wheel D by means of the rod D', connecting the joint or knee B7 with the wristpin D2 on the'wheel. Power may be applied to the crank-wheel shaft in any known manner.

When two cutter-heads fixed upon opposite ends of a common shaft and two carriers are employed, as shown, the two carriers are operated by duplicate toggle mechanism.

The toggle mechanism for operating the carrier shown at the right-hand end in Fig. 1 is shown in part only.-

The movements of the duplicate mechanisms are made synchronous with each other by means of the connecting-rod D3, which is secured at its ends to the respective wrist or crank pins. Such an arrangement and move IOO ment of the parts cause the blocks in the carriers to engage their respective cutterheads simultaneously, and the end thrust imparted by one block to the shaft or spindle which supports the cutter-heads is offset or balanced by the end thrust in the opposite direction imparted by the other block, thereby reducing the end friction and wear of the spindle upon its bearings to a minimum and securing great uniformity in the product of the machine. The blocks may be placed in the carrier by hand or fed thereto automatically through the duplicate hoppcrs F F. The hoppers are provided with a carrier-way leading from a platform F to the vertical chute F2. The bottom or floor of the way may be a movable carrier, as the belt F3, mounted upon the guide-rolls F4 F5 to carry the blocks F6 from the platform to the vertical chute. A friction-roll F7 projects through the vertical wall of the chute to engage the adjacent block and force it down the chute. The pulley F8, fixed upon the friction-roll shaft, is connected by belt F9 with the crankshaft, as shown partly by dotted lines. The cogged Wheel F10, fixed upon the friction-roll shaft, meshes with a similar cogged Wheel F12 ou the shaft of roll F4, and causes the friction-rolls and the floor of the carrier-ways to move in the proper direction to feed the blocks. The mouth of the vertical chute is controlled by the body-plate B of the subjacent carrier. The blocks fall down the vertical chute and fill the same, the lower block in the chute being supported by the block in the carrier when the carrier is inthe position shown in Fig. l.

Then the carrieris advanced, the block in the carrier is pushed out from under the vertical column of blocks in the chute and the lower block therein rests upon the body-plate 0f the carrier. Then the carrier returns empty to the position shown, the column of blocks descends until the lower block enters the carrier, when the operation may be repeated.

The forward movement of the carrier is adjusted to force the blocks into engagement with the bits A7 of the cutter-heads to cut the required depth therein.

The depth of the cut may be varied by varying the length of the arms of the togglejoint or either of them. The piece a of one of the arms may be right and left hand threaded at its ends and rotate in correspondinglythreaded sockets a'. By turning thev piece a the arm can be either shortened or lengthened.

For the purpose of holding the block firmly against the carrier-head while the cutter-bits are in engagement with the block and for pushing the block away from the bits in axial line with the cutter-head after the work of cutting is finished I provide a plurality of yielding stops, preferably one for each corner of the block, secured to the fixed bearings of the cutter-head spindle.

The stops H severally comprise a spindle H', having an eccentric disk or head H2, adapted to engage a corner of the block. rlhe spindle is rotarily movable and movable endwise in an inclosing barrel or support H3. A coil-spring H4, inclosed by the barrel, surrounds the spindle and bears at one end on a collar H5 on the spindle and at the other end on the bottom of the barrel. The screwthreaded plug HG is centrally apertured to form a bearing for one end of the spindle and is inserted in the similarly-threaded open end of the barrel, the latter being centrally apertured at its bottom end to receive the other end of the spindle. The spindle projects through the bottom of the barrel and is provided With a fixed feather H8, adapted to fit a groove in the washer Il. The washer is centrally apertured to receive the projecting end of the spindle and provided with an enlai-ged opening to receive and fit the boss H10, projecting from the bottom of the barrel. The Washer is also provided with a set-screw H12, by which the washer can be fixed upon the boss. By revolving the Washer upon the boss rotary movements can be communicated to the spindle and the eccentric head Afixed to project at any desired angle from the spindle by means of t-he set-screw. The spindles are fixed relatively to the axial line of the cutterhead and carrier and placed parallel to and equidistant from such axial line, and by rotatively adjusting them the several eccentric spindle heads or stops will bc given a correspondingly radial adjustment relatively to the cutter-head and carrier. The object of such adjustment is to accommodate the stops to blocks varying in size.

The block is square and the round figure cut therein covers most of its face, as seen in Fig. 8, the larger part of uncut surface being found at the corners. The stops are therefore arranged .to engage the projecting corners, and since the blocks vary greatly in size it is necessary to provide for radial adjustment.

The carrier-heads are provided with adj ustable corner-pieces J, adapted to receive the lower corners of differentsized blocks and support the blocks in the axial line ofthe carrier and cutter-head. Each of the block-supporting pieces has in its body part J2 an elongated slot J 3, adapted to receive an attachingbolt J 4. The head of the carrier is also provided on each side with an open slot or recess J, adapted to receive the attaching-bolt. The bolt, screw-threaded on one end, is inserted in the respective slots in the piece and head, as shown in Fig. 3, and secured to the head by a nut J6. Vertical adjustment is secured by a vertical movement of the piece on the bolt and a lateral adjustment bya horizontal movement of the bolt in the recess J5. The

pieces each have a flange or flanges projecting from the body part at right angles to the carrier-head.

The horizontal flanges J 7 serve to support the block and the vertical fian ges J 8 to guide IOO IIO

the blockv by engagement with its vertical edges. The upper end J 9 of each vertical flange is made to Hare outward to better guide the block onto the carrier as it falls from the feed-chute.

By means of the vertical and horizontal or lateral adjustments of the corner-pieces I am able to support blocks varying considerably in size in axial line with the cutter-head.

To force the blocks down firmly upon the corner-pieces to give them a solid bearing, I provide the inclined presser-bar K, secured to the cross-bar K', to be engaged by the upper edge of each block as it is borne by the carrier to the cutter-head. The cross-bar is adj ustably secured at its ends to the side rails of the main frame of the machine by bolts K2 in slots K3, as shown in Figs. 1 and 2. The presser-bar is preferably a spring adapted to yield slightly as the block engages it to compensate for accidental variation in the size of the blocks intended to be of uniform size.

After the blocks are cut and forced from the cutter-head by the spring-actuated stops they are stripped from the carrier by means of the stripper S,which is a spring fixed upon the cross-bar S and provided with an upwardly-inclined end S2, normally located in the path of the block, along which it is borne by the carrier, as shown in Fig. 1. As the block passes over the stripper it forces down the end S2, which rises again to its normal position as soon as the block has passed. When the carrier returns,the block will strike the end of the stripper and be forced from the carrier and fall to the lioor beneath or into any suitable receptacle which may be placed to receive it. The upwardly-inclined end of the stripper will also serve as a guide for the lower edge of the block as it falls Afrom the feed-chute into the carrier.

In Fig. 3 and partly by dotted lines in Fig. l I have shown a modified form of stripper consisting of a linger S2, pivoted intermediately of its ends upon a cross-bar of the frame, the lower end of the finger being weighted to maintain by gravity the upper end of the finger normally in the path of the blocks. The ends of the stripper-supporting cross-bars are screw-threaded and adj ustably supported in the Vertical slots S4 by nuts S5. The strippers are adjusted vertically to correspond with the size of blocks tobe cut.

I have ascertained that the blocks are given a smoother iinish and polish on the cut surfaces when the blocks are permitted to rest for a brief interval just as the cutter-bits have completed the cutting operation.

The cutter-head is preferably given five or six thousand revolutions a minute, and the light contact of the moving bits with the cut surface of the blocks after the blocks are brought to rest gives the iinishingpolish. As a means for aifording the blocks such rest interval I provide a yielding connection between the driving mechanism and the reciprocatory carrier and a stop for limiting the barrel P, having a screw-threaded centrallyapertured plug P inserted in one of the interiorly-screw-threaded ends of the barrel. The lower stem P2 is pivoted upon the wristpin and is provided with a movable collar P3, adjustably xed in position longitudinally of the rod by the adjusting-screw P4. The upper end of this stem is surrounded by the coil-spring P5 and inserted in the barrel, as shown. The other screw-threaded end of the barrel is provided with an inserted tubeP, exteriorly screw-threaded on one end and interiorly threaded on the other end. The exteriorly-threaded end is inserted in the barrel, and the other end receives the exteriorlythreaded end of the upper eyepiece P7. The lower end of the coil-spring bears upon the adjustable collar and the upper end upon the inserted end of tube P6. The resilient force of the coil-spring is sufficient to maintain the connecting-rod D at its full length until the toggle-arms have been forced into approximately the same straight line and the blockcarrier to the desired limit of movement toward the cutter-head, in which position the toggle mechanism engages the stop P8 on the bottom of the carrier-plate, as indicated by dotted lines in Fig. l.

The collar P3 is so adj usted on the stem P2 that the carrier has been forced to such limit of movement when the wrist-pin in its revoluble movement around its shaft is several degrees back of that point which is in line with the axes of the crank-shaft and togglejoint, so that the carrier will remain at rest while the pin is making the angular movement required to reach such axes-connecting line and an equal movement beyond such line, the coil-'spring yielding sufficiently to allow `the lower stemP2 to slide through the outer barrel into the tube P6. It is also desirable that the carrier should be given an interval of rest in the position shown in Fig. l to allow a block to be fed from the chute into the carrier. This is accomplished by the coilspring P2, which is strong enough to force the carrier back against the stop P10 and hold it in that position while the wrist-pin passes through several degrees of angular movement around the lower side of the crank-wheel.

What I claim as new, and desire to secure by Letters Patent, is- Y l. In a corner-block machine, the combination with a rotary endwise-xed cutter-head and spindle, of a block-supporting carrier, carriersupporting Ways parallel with the axial line of the spindle and leading approximately to the head, reciprocatory mechanism IIO stops located in the path of a carried block, and adjustable radially to the axial line of the entter-head'and carrier, substantially as described. 1 5

In testimony whereof I have hereunto set my hand this 7th day of January, 1893'.

EMERSON BELDEN.

Vitnesses:

GEO. A. MOSHER, FRANK C. CURTIS. 

